• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2011, Volume: 4, Issue: 11, Pages: 1396-1401

Original Article

Generating of digital fuzzifier with high resolution, high speed and low area ADC


This paper proposes a digital fuzzifier with 7 bit resolution. To achieve a high performance, the A/D conversion and fuzzification operation are done simultaneously on the same functional block, through a programmable membership function. To implement the idea we have used flash method for the 4 LSBs which results in high speed conversion. Although the 4 bit converting is adequate for most practical applications, we take advantage from successive approximation technique to achieve better precision, if needed. The proposed converter allows a significant amount of silicon area to be saved compared to fully parallel A/D. Result of extracting of the 7 bit A/D converter shows that the size of converter’s layout is less than 0.02 mm2 in 0.35µm CMOS standard technology. Moreover, the Hspice simulation showed that it can achieve 25 MHz speed and total power dissipation is 5mw in the aforementioned technology.
Keywords: Analog-to-digital converter, current mode, fuzzifier, thermometer, successive approximation


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